Notes on sorediate Parmelia species in North America with the first records of P. asiatica and P. barrenoae

The first record of Parmelia asiatica from North America is presented. The species differs from other sorediate Parmelia taxa in having narrow, sublinear lobes with circular or semicircular, terminal or marginal soralia. New records and earlier data together suggest that P. asiatica may be a more common taxon in the Northern Hemisphere than previously reported. Additionally, the first record of P. barrenoae from Canada and the central states of the USA is presented. Notes on similar sorediate species of the genus Parmelia are provided with information about secondary chemistry checked by thin-layer chromatography methods in solvents A and C.